A modular high step up quadratic boost topology with minimum phase behaviour for microsource applications

A modular high step up quadratic boost topology with minimum phase behavior for microsource applications is proposed in this paper. The proposed topology is modular as it is capable of accepting both DC as well as high frequency AC supply generated by microsurces such as solar cell modules and wind turbines etc. In the proposed topology the right half plane (RHP) zero gets completely eliminated for the boost operation thereby making it a minimum phase system. This also facilitates simple controller design. The proposed topology gives very high step up gain (about 17-18 times) to increase the output voltage of the microsources up to 421 V from the input voltage of 24 V. Steady state and dynamic modeling is carried out for the proposed topology. Verification is done on a 400 W prototype by giving 90 V (peak-to-peak) AC supply and 24 V DC supply.